// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.IO;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.SymbolSearch;
using Microsoft.VisualStudio.RemoteControl;
 
namespace Microsoft.VisualStudio.LanguageServices.Storage;
 
internal sealed class FileDownloader : IFileDownloader
{
    public sealed class Factory : IFileDownloaderFactory
    {
        public static readonly Factory Instance = new();
 
        public IFileDownloader CreateClient(string hostId, string serverPath, int pollingMinutes)
        {
            // BaseUrl provided by the VS RemoteControl client team.  This is URL we are supposed
            // to use to publish and access data from.
            const string BaseUrl = "https://aka.ms/vssettings/pub";
 
            return new FileDownloader(new RemoteControlClient(hostId, BaseUrl, serverPath, pollingMinutes));
        }
    }
 
    private readonly RemoteControlClient _client;
 
    private FileDownloader(RemoteControlClient client)
        => _client = client;
 
    public Task<Stream?> ReadFileAsync()
        => _client.ReadFileAsync(BehaviorOnStale.ReturnStale);
 
    public void Dispose()
        => _client.Dispose();
}